List any four primitive features of the tuatara.
The tuatara has the most primitive hearing organs among the amniotes. There is no eardrum, and the middle ear cavity is filled with loose _______ _______ _____ ______ _________ ___ ___.
__________ __________ ___ _______ ______ _____ __________ _______ _____ __________ ____.
_____ ___ ______ ______ _________ ______ ____.
______ ____ ____ __________ __________.
____ ________ ____ _____ _________ ______ ______ _________ ___ _______.
____ ____ _______ ____ _____ ________ ___ _________ ________.
______ _______ _______ _________ _______ ______ ______ ________ _________.
_____ ____ __________ _____ _____.
___ ____ _______ _______ _________ ______.
_______ ____ _______ _________.
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Uropygial and Salt Glands of birds
Give the examples of following: (Biological names)
i) Flying fish
ii) Flying reptile
iii) Lung fish iv) Aquatic mammal
Dental formulae of some mammals are given below. Identify the mammal to which the formula belongs from among the names of mammals.
i) =26 (cat, elephant, cow)
ii) = 42 (elephant, man, dog)
iii) = 32 (elephant, horse, man)
iv) = 28 (cow, dog, cat)
Names of some bones are given in column A and the part of the skeleton in which these bones occur in column B. Match them.
| Column A | Column B |
| a. Parietal | A. Pectoral girdle |
| b. Vomer | B. Cranium |
| c. Maxilla | C. Olfactory capsule |
| d. Dentary | D. Upper jaw |
| e. Clavicle | E. Pelvic girdle |
| f. Pubis | F. Lower jaw |
Describe the specialized sensory organs in fish and snakes.
Discuss echolocation in bats.
Define “Fixed Action Pattern” (FAP) and give its two suitable examples.